Make properly pip installable without needing build isolation (uv pip install now works too)

[kszlim]

Now you can just pip install mamba_ssm and it will work, previously it would throw unless you had packaging and torch already installed. It would also always fail if you had build isolation on (which will be on by default in the future within pip).

As a side effect, now uv can uv pip install mamba_ssm properly now.

Take note that installing causal-conv1d via the optional extra will still fail with build isolation due to that package needing similar changes to this one.

[kszlim]

I tested this by creating an empty workspace/venv where i pip installed mamba_ssm into with uv and pip with build isolation on.

I also verified that I could run the benchmark.

Please give this a spin and see if it works for you.

[kszlim]

If Dao-AILab/causal-conv1d#26 is merged, then:

Take note that installing causal-conv1d via the optional extra will still fail with build isolation due to that package needing similar changes to this one.

Should no longer be true.

[kszlim]

@albertfgu @tridao any chance this can be accepted (i'll update it if so), otherwise this can be closed.

[riZZZhik]

@albertfgu @tridao Hi,

Can you approve this pr?
It actually fixes installation issues with this library

btw @kszlim thanks, good work!

[kdre]

Please approve this pr. It also fixed my installation issue.

[amrit110]

Hi @tridao when is a new release to pypi expected with this fix? The installation of the latest available package fails.